package com.apex.utils;

/**
 * @ClassName RedisIdWorker
 * @Description
 * @Author ZJX
 * @Date 2025/2/23 20:42
 * @Version 1.0
 **/

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

@Component
public class RedisIdWorker {
//    开始时间戳
    private static final long BEGIN_TIMESTAMP = 1735689600L;

//    序列号的位数
    private static final int COUNT_BITS = 32;

    private StringRedisTemplate stringRedisTemplate;

    public RedisIdWorker(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    public long nextId(String prefixKey) {
//        1. 获取时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);

        long timestamp = nowSecond - BEGIN_TIMESTAMP;

        // 2.生成序列号
        // 2.1.获取当前日期，精确到天
        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));

        // 2.2.自增长
        long count = stringRedisTemplate.opsForValue().increment("icr:" + prefixKey + ":" + date);

        return timestamp << COUNT_BITS | count;
     }

    public static void main(String[] args) {
        LocalDateTime localDateTime = LocalDateTime.of(2025, 1, 1, 0, 0, 0);
        long epochSecond = localDateTime.toEpochSecond(ZoneOffset.UTC);
        System.out.println(epochSecond);
    }
}
